Massachusetts 121st State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Lyndon B. Johnson1964
89.6%
5,933 votes · D+79.2 · modeled estimate
Runner-up · Joe Biden, 2020 · 82.3%
Republican
William McKinley1896
48.0%
218 votes · D+0.7 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 45.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
10,740votes
82.3% of the vote · D+66.1 · modeled estimate
Runner-up · Hillary Clinton, 2016 · 9,774 votes
Republican
Donald Trump2024
2,464votes
21.6% of the vote · D+54.2 · modeled estimate
Runner-up · Mitt Romney, 2012 · 2,139 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
George McGovern1972
+79.8pts D vs U.S.
Place D+56.7 · U.S. R+23.2 · modeled estimate
Runner-up · John Kerry, 2004 · +67.0 pts
Republican
William McKinley1896
−6.7pts R vs U.S.
Place D+0.7 · U.S. R+6.1 · modeled estimate
Runner-up · Alf Landon, 1936 · −23.6 pts
current representation
Current officeholders
DRita MendesState House · 11th Plymouth
State legislative officeholder from OpenStates nightly current-legislator data.
The 11th Plymouth District backed the 2024 Democratic presidential nominee by nearly 54 points, placing it among the most reliably left-leaning legislative districts in a state already dominated by Democratic voters at the federal level.
Across the recorded series it reached a Democratic high of 79.2 points in 1964. Between 2020 and 2024 the district moved 11.9 points toward the Republican candidate; the 2024 margin was 54.2 points.
A population of 42,514, a 18% non-Hispanic-white share, and a median household income of $68,741 describe the district. The district's voting pattern over the last decade is most similar to that of 6th Suffolk District and 10th Plymouth District.
Akashic
Political twins — state-house districts
The state-house districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Massachusetts 121st State House District. Akashic. https://akashic.app/sld-lower/25121/. Accessed May 20, 2026. License: CC BY 4.0.
How did Massachusetts 121st State House District vote in 2024?
In 2024, Massachusetts 121st State House District voted Democratic by 54.2 points (D+54.2), carried by the Democratic candidate. Out of 11,409 votes cast, 8,647 went Democratic and 2,464 went Republican.
How many people live in Massachusetts 121st State House District?
Massachusetts 121st State House District has a population of 42,514 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Massachusetts 121st State House District?
Median household income in Massachusetts 121st State House District is $68,741 — below the national median of $80,734. The Massachusetts state median is $103,960.
What is the political history of Massachusetts 121st State House District?
Akashic tracks 38 presidential elections in Massachusetts 121st State House District from 1876 to 2024. Of those, 38 went Democratic and 0 went Republican.